Boxwood Winter Gem Japanese One Gallon Shipped as a potted one gallon shrub in its original soil and container. Winter Gem Boxwood is an excellent evergreen shrub for small hedges. Among the hardiest of boxwoods, it retains its dark green velvety foliage color in winter. Moderate grower to 4 to 6 ft. tall and wide if left un clipped or easily clipped to any size or shape. Full to partial sun. Hardy to -20 to -10 F. Good foundation plant or small hedge.